JPS6037237Y2 - Workpiece transfer mechanism for automatic machine tools, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a workpiece transfer mechanism such as an unloader and an autoloader in an automatic machine tool or the like.

As an autoloader, a hydraulic transfer mechanism is generally used as a transfer device because it requires precision, but hydraulic cylinders cost 30% less than pneumatic ones.
If the stroke is nearly twice that of 300 rrvn or more, it becomes very expensive.

The unloader costs at least 500rrr! Since a stroke of n or more is required, the pneumatic type is used, but some general factories do not have air pressurization equipment, and in that case, the pneumatic type cannot be used.

If a hydraulic or pneumatic type is used, a cylinder with a length corresponding to the transfer stroke of the workpiece is required, and the overall space is approximately twice as large.

The purpose of this invention is that it does not require hydraulic or pneumatic pressurization equipment, and even for large transfer strokes, it takes up about half the space compared to hydraulic or pneumatic systems. A simple mechanism provides an effective transport mechanism for receiving, transporting, and completely releasing and transferring workpieces.

Next, the present invention will be described with reference to the drawings showing one embodiment thereof.
The action and effect will be explained in detail.

1 shown in the cutout plan view in Figure 2 and the cutout left side view in Figure 3 is a horizontally elongated slide base with a vertical rectangular cross section, and as shown in each figure, along the upper and lower parts of the front side. , horizontal guide plates 2a and 2b of the same length are installed side by side, and a holding plate 3 is attached to each left end with each bolt 3', and a retaining plate 3 is attached to the right end with a bolt 3', which will be described later. Connect each bolt 13' to the holding plate 13.13 via the vertical guide plate 12.12.
It is fixed by penetrating and screwing, and the cross section as a whole is U.
A guide frame 4 is formed by three circumferential walls in the shape of a letter.

Reference numeral 5 denotes a slide shaft formed by bending a steel plate to have a transverse U-shaped cross section and a length corresponding to the slide distance, and is fitted into the three peripheral walls of the guide frame 4 so as to be slidable in the longitudinal direction.

Reference numeral 6 denotes a chino, which is stretched and fixed along the upper edge of the slide shaft 5.

Reference numeral 7 denotes a sprocket which is fitted into a chain 6 installed in the slide shaft 5. The rotating shaft 8 of the sprocket 7 has a large diameter portion 8' projecting from its rear end.

Reference numeral 9 denotes an elevating and lowering slide plate, which, as shown in FIG. 2, has stepped wide portions 9', 9' on both front sides, and has a bearing in a through hole in the center that pivotally supports the rotating shaft 8 of the sprocket 7. A motor 11 is fitted with a motor 10 and connects the rotating shaft 8 to the front side.
Install.

As shown in FIGS. 2 and 3, the vertical guide plates 12, 12 are designed to fit the vertical slide plate 9 in a vertically movable manner.
They are arranged long in parallel in the vertical direction, and each front has a sliding surface 12a inwardly,
12a is installed, and its front sides are narrow surfaces 12b, 12b.
and a holding plate 13 wider than the narrow surface 12b in front of it.
．． 13 is fixed by screwing bolts 13', 13' through the slide base 1 until it reaches the slide base 1, and the wide part 9 of the elevating slide plate 9 is attached to the inner sliding surfaces 12a, 12a. ', 9' are slidably inserted.

A solenoid 14 is attached to a mounting frame 14' fixed to the upper surface of the right end of the guide frame 4, and connects the upper end of the elevating slide plate 9 below the solenoid rod 14a.

The solenoid 14 is electrically connected to the motor 11 .

In this drawing, the solenoid 14 is only partially installed on the upper surface of the guide frame 4, but in some cases, the solenoid 14 may be installed on both the upper and lower surfaces of the guide frame 4 so that the solenoid 14 extends in the sliding direction of the slide shaft 5. On the other hand, the sliding movement of the vertical sliding plate 9 in the right angle direction is made more effective.

By doing so, the transfer device of the present invention is applicable not only to the case of lateral transfer by sliding of the slide shaft 5;
Install the guide frame 4 vertically or inclinedly,
Depending on the mounting direction, it can be effectively used for transportation in any direction, such as vertical or inclined directions.

Reference numeral 15 denotes a positioning member fixed on the lower edge of the slide shaft 5, with a chevron-shaped protrusion 15a protruding from the upper surface of one side, and a buffer plate 16 made of an elastic steel plate fixed upwardly in the middle part. Fitting recess 1 between the inclined surface of the chevron-shaped protrusion 15a
5b, when the elevating slide plate 9 is lowered and the sprocket 7 is at the lowest position, the large diameter portion 8' protruding from the rear end of the rotating shaft 8 is formed as shown by the dashed line in FIG. It fits into the fitting recess 15b.

The positioning abutments 15 are fixed at fixed positions on both sides of the inner surface of the bottom plate of the slide shaft 5 with screws 15' symmetrically with the attachment side of each buffer plate 16 facing outward.

(The one on the left is omitted in Figure 1.

) 17a and 17b are limit switches, which are attached to the upper surface of both left and right ends of the guide frame 4, and a shaft piece 17' is attached below.
be installed vertically.

Reference numeral 18 denotes contact projections (the one on the left side is omitted in FIG. 1) projecting from the upper surface of both ends of the slide shaft 5.

), the limit switches 17a and 17b are brought into contact with each other, and electrical commands are sent to the motor 11 and the solenoid 14.

The present invention has the above-mentioned configuration, and as shown in the front view of FIG. When the slide surface slides in the left-lateral direction and reaches the left position, the contact projection 18 protruding from the upper surface of the right end of the slide shaft 5 contacts the shaft piece 17' of the right limit switch 17b, and at the same time The electrical command cuts off the current in the motor 11 and the solenoid 14, stopping the rotation of the motor.

At the same time, the buffer plate 16 standing upright on the positioning stopper 15 fixed on the bottom plate inside the slide shaft 5 comes into contact with the large diameter part 8' protruding from the rear end of the rotating shaft 8 of the sprocket 7, and the sprocket 7 has a slight backlash with the chino 6, so the solenoid 1 connected to it is
When the solenoid rod 14a of No. 4 is pulled down and lowered, the sprocket 7 is at the lowest position as shown by the dashed line, and the large diameter portion 8' protruding from the rear end of the rotating shaft 8 is fitted into the solenoid rod No. 15 for positioning. By fitting into the recess 15b, the slide shaft 5 is instantly stopped at a fixed position.

Once again, an electrical command from the outside causes the current to flow, activating the solenoid 14, and raising the solenoid rod 14a.Accordingly, the elevating slide plate 9 is pulled up, and at the same time, the motor 11 connected to the solenoid 14 is reversed. The sprocket 7 fits into the chino 6 and the slide shaft 5 rotates.
slides to the right.

When the slide shaft 5 reaches the right position, the contact protrusion 18 protruding from the upper surface of the left end of the slide shaft 5 contacts the shaft piece 17' of the left limit switch 17a, and at the same time, the electric command causes the motor 11 and solenoid 1
4 is turned off, the rotation of the motor 11 is stopped, and in the same manner as described above, the large diameter portion 8' of the rotating shaft 8 of the sprocket 7 is buffered by the buffer plate 16 and lowered into the fitting recess 15b.
The slide shaft 5 instantly stops at the fixed position.

In this way, the slide shaft 5 reciprocates in the lateral direction at regular intervals and stops at a fixed position, and its periodic movement is controlled by the limit switches 17a, 17b and the solenoid 14.
It is exactly and completely repeatable according to the electric command of.

Therefore, by attaching a workpiece grasping mechanism to one end of the transfer mechanism of the present invention and installing it in an automatic machine tool, etc., operations such as receiving, carrying-in and transferring, releasing and handing over as an unloader and autoloader can be performed accurately and completely. It does not require conventional hydraulic or pneumatic pressurization equipment, the overall size of the device is relatively small even for large transfer strokes, and the simple mechanism makes it inexpensive. This has great practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a cutaway front view thereof, FIG. 2 is a cutaway plan view excluding the thread maid part and limit switch, and FIG. 3 is a cutaway view of the limit switch part and the left presser foot. FIG. 2 is a cutaway left side view of the same, excluding the plate portion. 1 is a slide base, 2a and 2b are horizontal guide plates, 3 is a presser plate, 3' is a bolt, 4 is a guide frame, 5 is a slide shaft, 6 is a chino, 7 is a sprocket, 8 is a rotation axis, 8' is a large Diameter part, 9 is an elevating slide plate, 9' is a wide part, 10 is a bearing, 11 is a motor, 12 is a vertical guide plate, 1
2a is a sliding surface, 12b is a narrow surface, 13 is a holding plate, 13'
is a bolt, 14 is a solenoid, 14' is a mounting frame,
14a is a solenoid rod, 15 is a positioning stop, 15a is a chevron-shaped protrusion, 15b is a fitting recess, 15' is a screw, 16 is a buffer plate, 17a and 17b are limit switches, 17' is a shaft piece, and 18 is a stop protrusion.

Claims (1)

[Scope of utility model registration request] On the front surface of the slide base 1, horizontal guide plates 2a and 2b are arranged in parallel along the upper and lower sides, and a presser plate 3 and a presser plate 13.13 are fixed in the vertical direction via the parallel vertical guide plate 12.12. The slide shaft 5 is slidably inserted into the idle frame 4, and the chino 6 is suspended along the upper edge of the slide shaft 5. Positioning unit 1 with a fitting recess 15b between
5.15 are fixed symmetrically with the buffer plate 16 side facing outward, and the elevating slide plate 9 is inserted into the parallel vertical guide plate 12.12 so as to be able to rise and fall freely, and the front surface of the elevating slide plate 9 is A motor 11 is fixed to the shaft, and a rotating shaft 8 of a sprocket 7 that fits into a chino 6 mounted on the slide shaft 5 is supported by a bearing 10 fitted in a shaft hole drilled in the center.
A large diameter portion 8' that can be fitted into the fitting recess 15b is provided at the rear end of the rotating shaft 8, the front end is connected to the motor 11, and a limit switch 17 is installed at the end of the guide frame 4. A workpiece transfer mechanism for an automatic machine tool, etc., which is provided with a stop 18 at the end of the slide shaft 5, which contacts the limit switch 17 at a fixed position.